Effect of Precipitation Hardening on the Fatigue Strength

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概要

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• Effect of precipitation hardening on the rotary bending fatigue strength of an austenitic heat resisting steel was investigated at room temperature. It was concluded that strengthening processes such as precipitation hardening were effective only when fatigue cracks formed were associated with slip bands, but in the presence of structural inhomogeneity such as twin boundaries the stress concentrated readily there and the fatigue strength decreased in spite of a hardness increase. In this case the work hardened layer had an important role of making the structure homogeneous at surface and it could prevent a decrease in fatigue strength. In order to improve the fatigue strength it was most important to reduce the structural inhomogeneity as well as to harden.

• 社団法人日本機械学会の論文

著者

• Kobayashi Mitsuyuki

  Assistant Professor Department Of Mechanical Engineering Faculty Of Technology Shinshu University

• YAMAMOTO Masaru

  Assistant, Department of Mechanical Engineering, Faculty of Technology, Tokyo Metropolitan Universit

• MIYAGAWA Ohmi

  Professor, Department of Mechanical Engineering, Faculty of Technology, Tokyo Metropolitan Universit

• Miyagawa Ohmi

  Professor Department Of Mechanical Engineering Faculty Of Technology Tokyo Metropolitan University

• Yamamoto Masaru

  Assistant Department Of Mechanical Engineering Faculty Of Technology Tokyo Metropolitan University

関連論文

• Effect of Precipitation Hardening on the Fatigue Strength

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